# A012364 (b-file synthesized from sequence entry)
0 1
1 0
2 1
3 6
4 37
5 260
6 2317
7 24178
8 288937
9 3858312
10 57255609
11 933952030
12 16622217357
13 320373757964
14 6649221916677
15 147840789218442
16 3506147948661457
17 88343770525310736
18 2356871357851041777